Datasheet > LT3932

LT3932

更新时间： 2023-12-20 18:45:34

品牌	Logo	应用领域
亚德诺 - ADI		驱动驱动器
页数	文件大小	规格书
30页	3074K
描述
36V、2A 同步降压型 LED 驱动器

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中文翻译

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数据手册

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LT3932 数据手册

LT3932/LT3932-1

36V, 2A Synchronous

Step-Down LED Driver

FEATURES

DESCRIPTION

The LT^®3932 , featuring the Silent Switcher^®architecture

to minimize EMI/EMC emissions, utilizes fixed-frequency,

peak current control and provides PWM dimming for a

string of LEDs. The LED current is programmed by an

analog voltage or the duty cycle of pulses at the CTRL pin.

An output voltage limit can be set with a resistor divider

to the FB pin.

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±±125 ꢃCtꢄCt ꢅꢂltage ꢁegClatiꢂn

.000:±/±0000+:± PWM Dimming at ±00Hz

(LT3932/LT3932-±)

±28:± Internal PWM Dimming

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3.6V to 36V Input Voltage Range

The switching frequency is programmable from 200kHz to

2MHz by an external resistor at the RT pin or by an exter-

nal clock at the SYNC/SPRD pin. With the optional spread

spectrum frequency modulation enabled, the frequency

varies from 100% to 125% to reduce EMI. The LT3932

also includes a driver for an external, high side PMOS for

PWM dimming and an internal PWM signal generator for

analog control of PWM dimming when an external signal is

not available. The LT3932-1 permits higher dimming ratios.

0V to 36V LED String Voltage

200kHz to 2MHz with SYNC Function

99.9% Maximum Duty Cycle

20:1 Analog or Duty Cycle LED Current Control

Open/Short LED Protection and Fault Indication

Accurate LED Current Sense with Monitor Output

Programmable UVLO

Thermally Enhanced 28-Pin (4mm × 5mm) QFN

AEC-Q100 Qualified for Automotive Applications

Additional features include an LED current monitor, an

accurate EN/UVLO pin threshold, open-drain fault report-

ing for open-circuit and short-circuit load conditions, and

thermal shutdown.

APPLICATIONS

Automotive Lighting

Industrial and General Purpose Lighting

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. Patents including 7199560, 7321203, 9596728, 9642200 and other patents pending.

Machine Vision Systems

TYPICAL APPLICATION

2A LED Driver with Internal PWM Dimming

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Internal PWM Dimming

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50mΩ

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Rev C

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中文翻译

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与LT3932相关器件

型号	品牌	获取价格	描述	数据表
LT3932-1	Linear	获取价格	36V, 2A Synchronous Step-Down LED Driver
LT3932EUFD-1#PBF	Linear	获取价格	LT3932/LT3932-1- 36V, 2A Synchronous Step-Down LED Driver; Package: QFN; Pins: 28; Tempera
LT3932HUFD-1#PBF	Linear	获取价格	LT3932/LT3932-1- 36V, 2A Synchronous Step-Down LED Driver; Package: QFN; Pins: 28; Tempera
LT3932IUFD-1#PBF	Linear	获取价格	LT3932/LT3932-1- 36V, 2A Synchronous Step-Down LED Driver; Package: QFN; Pins: 28; Tempera
LT3935	ADI	获取价格	集成Silent Switcher的36V、4A同步降压LED驱动器
LT3942	ADI	获取价格	36V、2A同步降压-升压转换器和LED驱动器
LT3950	ADI	获取价格	60V, 1.5A LED Driver with Internal Exponential Scale Dimming
LT3950EMSE	ADI	获取价格	60V, 1.5A LED Driver with Internal Exponential Scale Dimming
LT3950JMSE	ADI	获取价格	60V, 1.5A LED Driver with Internal Exponential Scale Dimming
LT3952	ADI	获取价格	60V, 1.5A LED Driver with Internal Exponential Scale Dimming

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